[Bug 2088404] [NEW] dracut by default fails when lvm has system_id

[Brett Frankenberger]

Public bug reported:

On oracular (probably others as well), by default, the dracut initrd will not have /etc/lvm/{lvm.conf,lvmlocal.conf}.  (This differs from initramsfs-tools based initrds).  As a consequence, systems on which root is on a LV on a LVM VG with a system_id will fail to be found, because the
system_id configured in /etc/lvm/{lvm.conf,lvmlocal.conf} will not be used by the LVM in initrd.

So it gets to basic.target and then hangs because root can't be mounted because the LV can't be
activated because the VG can't be found.

Adding "lvmconf=yes" to the dracut configuration (and then rebuilding the initrd) will work-around:
   $ cat /etc/dracut.conf.d/RBF-lvm.conf 
   lvmconf=yes

Relevant lines from lvm.conf/lvmlocal.conf:
$ grep system_id *conf | grep -v #
lvm.conf:       system_id_source = "lvmlocal"
lvmlocal.conf:  system_id = "<redacted>"


Description:    Ubuntu 24.10
Release:        24.10

dracut-core   103-1ubuntu3   amd64

Expected:  "apt-get install dracut" would successfully convert working
initramfs-tools system to dracut system.

What Happened:  System hung at basic.target until initrd was rebuilt
with "lvmconf=yes".

** Affects: dracut (Ubuntu)
     Importance: Undecided
         Status: New

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https://bugs.launchpad.net/bugs/2088404

Title:
  dracut by default fails when lvm has system_id

Status in dracut package in Ubuntu:
  New

Bug description:
  On oracular (probably others as well), by default, the dracut initrd will not have /etc/lvm/{lvm.conf,lvmlocal.conf}.  (This differs from initramsfs-tools based initrds).  As a consequence, systems on which root is on a LV on a LVM VG with a system_id will fail to be found, because the
  system_id configured in /etc/lvm/{lvm.conf,lvmlocal.conf} will not be used by the LVM in initrd.

  So it gets to basic.target and then hangs because root can't be mounted because the LV can't be
  activated because the VG can't be found.

  Adding "lvmconf=yes" to the dracut configuration (and then rebuilding the initrd) will work-around:
     $ cat /etc/dracut.conf.d/RBF-lvm.conf 
     lvmconf=yes

  Relevant lines from lvm.conf/lvmlocal.conf:
  $ grep system_id *conf | grep -v #
  lvm.conf:       system_id_source = "lvmlocal"
  lvmlocal.conf:  system_id = "<redacted>"

  
  Description:    Ubuntu 24.10
  Release:        24.10

  dracut-core   103-1ubuntu3   amd64

  Expected:  "apt-get install dracut" would successfully convert working
  initramfs-tools system to dracut system.

  What Happened:  System hung at basic.target until initrd was rebuilt
  with "lvmconf=yes".

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